Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 15th fib International PhD Symposium in Civil Engineering, 2024 |
| Editors | György L. Balázs, Sándor Sólyom, Stephen Foster |
| Publisher | fib. The International Federation for Structural Concrete |
| Pages | 601-608 |
| Number of pages | 8 |
| ISBN (print) | 9782940643240 |
| Publication status | Published - 28 Aug 2024 |
| Event | 15th fib International PhD Symposium in Civil Engineering, 2024 - Budapest, Hungary Duration: 28 Aug 2024 → 30 Aug 2024 |
Publication series
| Name | fib Symposium Proceedings |
|---|---|
| ISSN (Print) | 2617-4820 |
Abstract
Freeze-thaw action represents one of the decisive durability exposures in cold and temperate climates, limiting durability and the sustainable use of concrete. For service life prognosis, knowledge of local material properties and their evolution when subjected to such exposures is essential, but a detailed understanding of the spatial progression of damage based on localized freeze-thaw conditions is missing so far. Therefore, in this study the influence of spatial moisture distribution during freeze-thaw action on crack formation and porosity changes in hardened cement paste was investigated. It was found, that surface scaling and fracture already occur within the first few freeze-thaw cycles at high moisture contents, however influenced by different water-to-cement ratios. Material degradation occurs at both nano-and micrometer scale, evidenced from gas adsorption measurement as well as mercury intrusion porosimetry measurement, with the localization of damage being of key interest as to describe the freeze-thaw damage propagation. In combining spatial moisture content of preceding freeze-thaw events with resulting alterations of porosity, a more comprehensive understanding of the influence of exposure history is gained.
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
- Materials Science (miscellaneous)
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Proceedings of the 15th fib International PhD Symposium in Civil Engineering, 2024. ed. / György L. Balázs; Sándor Sólyom; Stephen Foster. fib. The International Federation for Structural Concrete, 2024. p. 601-608 (fib Symposium Proceedings).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Microstructural degradation from freeze-thaw attack–spatial exposure history and effects on multiscale porosity
AU - Mahlbacher, Markus
AU - Mett, Felix
AU - Broggi, Matteo
AU - Beer, Michael
AU - Haist, Michael
N1 - Publisher Copyright: © Fédération Internationale du Béton–International Federation for Structural Concrete.
PY - 2024/8/28
Y1 - 2024/8/28
N2 - Freeze-thaw action represents one of the decisive durability exposures in cold and temperate climates, limiting durability and the sustainable use of concrete. For service life prognosis, knowledge of local material properties and their evolution when subjected to such exposures is essential, but a detailed understanding of the spatial progression of damage based on localized freeze-thaw conditions is missing so far. Therefore, in this study the influence of spatial moisture distribution during freeze-thaw action on crack formation and porosity changes in hardened cement paste was investigated. It was found, that surface scaling and fracture already occur within the first few freeze-thaw cycles at high moisture contents, however influenced by different water-to-cement ratios. Material degradation occurs at both nano-and micrometer scale, evidenced from gas adsorption measurement as well as mercury intrusion porosimetry measurement, with the localization of damage being of key interest as to describe the freeze-thaw damage propagation. In combining spatial moisture content of preceding freeze-thaw events with resulting alterations of porosity, a more comprehensive understanding of the influence of exposure history is gained.
AB - Freeze-thaw action represents one of the decisive durability exposures in cold and temperate climates, limiting durability and the sustainable use of concrete. For service life prognosis, knowledge of local material properties and their evolution when subjected to such exposures is essential, but a detailed understanding of the spatial progression of damage based on localized freeze-thaw conditions is missing so far. Therefore, in this study the influence of spatial moisture distribution during freeze-thaw action on crack formation and porosity changes in hardened cement paste was investigated. It was found, that surface scaling and fracture already occur within the first few freeze-thaw cycles at high moisture contents, however influenced by different water-to-cement ratios. Material degradation occurs at both nano-and micrometer scale, evidenced from gas adsorption measurement as well as mercury intrusion porosimetry measurement, with the localization of damage being of key interest as to describe the freeze-thaw damage propagation. In combining spatial moisture content of preceding freeze-thaw events with resulting alterations of porosity, a more comprehensive understanding of the influence of exposure history is gained.
UR - http://www.scopus.com/inward/record.url?scp=85216729830&partnerID=8YFLogxK
UR - https://www.fib-international.org/components/com_virtuemart/views/download/tmpl/stream.php?time=1739440608&hash=f678f7c63abf8a4776d01db04568bfdac81051ebddde0ad203e858b6de75abea&file=%2FFIBPRO-0066-2024-E-15th-PhD-Symposium-in-Budapest-Hungary.pdf
M3 - Conference contribution
AN - SCOPUS:85216729830
SN - 9782940643240
T3 - fib Symposium Proceedings
SP - 601
EP - 608
BT - Proceedings of the 15th fib International PhD Symposium in Civil Engineering, 2024
A2 - Balázs, György L.
A2 - Sólyom, Sándor
A2 - Foster, Stephen
PB - fib. The International Federation for Structural Concrete
T2 - 15th fib International PhD Symposium in Civil Engineering, 2024
Y2 - 28 August 2024 through 30 August 2024
ER -